Tire.



A. B. BURT.

URE,

APPLILLAHON nu' UNOV, Ml. i914..

Patented Feb. t5E 1916.

. UNITED STATES PATENT QFFICE.

ANDREW B. BURT, QF4 SN FRANCISCO, CALIFOBNA.

Tine.

To all fc-hom it may concern Be it known that I, ANDREW B. Bear, a citizenof the United'Sta'tes,-residing in the eity and county ot San Franes'co and State of California, have invented certain new and useful Improvements in Tires, of which the following is a specification.

The present invention relates to vehicle tires, and more particularly to that type of tire commonly termed pneumatic, and the invention has orits principal objeets to dispense with the fabric` case now universally employed in the construction of the side walls of a tire, and to substitute therefor a met; llie rim and to which a flexible tread `surface is detachably secured; to dispense with the inner tube now universally' in use, and to substitute a flexible strip therefor which is detaehably secured to the metallic rim, and by so doing lowering the cost of manufacture and reducing the cost of upkeep. lVith my improved structure I reduce the liability of blowouts, punctures and rim cuts by dispensing with 'considerable of the flexible material now in use.

'With the abore'mentioned and other obierts in view, the invention consists in the i ovol construction and Combination of parts hereinafter described, illustrated in the ae.- fompanving drawings and pointed out in the claims hereto appended; it being under- .stool that various changes in the form, pro portion. size and minordetails of construetiou within the scope of the claims hereto appended may be resorted to without de parting;r from the spirit or sacriticing any of the advanta'es of the invention.

To more lilly comprehend the invention. reference ie directed to the accompanying dra Wings. where ,h--

Figure 1 us .a ie'w in' side elevation, partly broken away, disclosing an embodiment of my vinvention Fig. is a transverse tional view.

.Ieierrii'ig more panticularly to the drav inge. wherein like characters of reference" designate f forresponding parts throughout the several viens-4 is a wheel felly on which is detachahly mounted the annular seinicii'cular metallic rim structure?, preferably formed o 'i :l single piece of material, and said struc-tire. is formed with a at base 3 adapted to rest on the periphery of the telly l. )in angular flange i is formed preferably integral with the base 3 and the same abuts against one Side edge of the felly Specification of Letters Patent.

l. A ring 5 formed with a flange 6, adapted to engage over one edge of the hase 3, abuts against the opposite side edge of the telly l, and through said ring 5, telly 1, and flange 4, are adapted to extend the securing bolts 7. The ends of the side walls of the rim strueture i2 are turned inwardly or flanged, as at 8, and secured in any suitable manner, as by brazing lo the opposite inner eide walls of said rim structure below the fli'inges S, are the annular inwardly 'projecting supporting iange members 9, An unbroken annular member or strip of material 10, preferably rubber, and formed at its edges with the annular beads 11, is adapted to reet at its opposite edges on the `supporting flange members 9, and the same is detachably secured in position in any suitable manner, as by the clamping rings 12. of anv Suitable construction, which frietionalli1 clamp the edges of the material to the flanges 9. The beads prevent the edges of the material from pulling?r between the clamp ringsl 12 and flanges 9 when air i5 forced under compression through the valve 12finto the chamber 13 formed by the rim structure 2 and the material 10. T he clamping'of' the strip 10 between the flanges 9 and rings 1&2 provides an air tight joint and prfvents the escape of the. air from the chamber. An annular tread 14, semi-circular in cross section and preferably formed of flexible, yieldable material, such-as rubber, is de taehabl'y secured to the rim structure Q. and

.said tread is provided on its outer surface adjacent opposite side edges with the annular grooves l5, in which'are received the flanges 8 of the rim structure 2. It will be apparent that the internal air pressure in the Chamber/1 3 will force the inner member if) outwardly and the same will exert presA v sure over the inner Surface of the tread and maintam the edges thereof in locked engagement vrith the flanges of the rim member i My improved structure dispenses with the inner tube new universally in use, and the tread surface requires but approximately onehalf of the material necessary in the now used outer Casing, thus reducing the initial cost of manufacture and lowering thev rim semi-circular in cross section and' formed on its peripheral edges with iny .Patented Feb. 3, 1916.

Application tiled November 10, 1914. Serial No. 871,275,

surface of said last mentioned flanges to form with .said rim an air chamber,gclamp ing rings for encircling the outer surfaces of the opposite edges of the strip to clamp the same. tightly against the outer surface of said last mentioned flanges, and a. flexible tread member formed on its outer surface adjacent to its opposite side edges with annular grooves and adapted for receiving said first mentioned flanges when said tread is positioned on said Tim. l

2. The combination of a hollow'rim semicircular in cross section and formed on its inner surface intermediate of its peripheral edges with oppositely disposed inturned annular flanges and on each peripheral edge with an annular flange, an elastic band adapted to rest atA its opposite side edges on said flanges to form with the rim an air chamber, a ring for encircling each flange to clamp the opposite edges of said band thereto, a flexible annular-ly grooved protecting surface. delarhabl)Y engaging said peripheral flanges. and a valve controlled connection in said rim for admitting air into said air chamber.

3. The combination with a hollow rim semi-circular in cross section terminating on each peripheral edge in an integral inwardly disposed flange, a strip of flexible material detachably secured to the opposite inner side edges of said rim to form with the rim an air chamber, and a flexible tread member formed with annular grooves for receiving said flanges when said tread is positioned on said rim.

In testimony whereof I have signed my name to this specification in the presence of tivo subscribing witnesses.

ANDREV B. BURT.

Witnesses: v

HARRY A. ToT'rEN D. B. RICHARns. 

